| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 50943 | Catalysis Communications | 2010 | 4 Pages |
The support ZrTiO4 and the lean-burn NOx trap (LNT) catalyst K/LaCoO3/ZrTiO4 were prepared by co-precipitation and successive impregnation, respectively. This catalyst exhibits much better NOx storage performance than the conventional Pt-containing catalyst K/Pt/ZrTiO4. Compared with Pt, the perovskite LaCoO3 possesses higher capability for NO to NO2 oxidation, giving a higher NOx storage capacity. NOx is mainly stored as nitrate at 350 °C over K/LaCoO3/ZrTiO4. Mild sulfation shows little effect on the structure and performance of this catalyst. Total substitution of Pt by perovskite LaCoO3 to lower the cost of LNT catalysts is feasible.
Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights►K/LaCoO3/ZrTiO4 is more capable for the oxidation of NO to NO2 than K/Pt/ZrTiO4.►K/LaCoO3/ZrTiO4 shows much larger NOx storage capacity (NSC) than K/Pt/ZrTiO4.►Mild sulfation shows small effect on the structure and property of K/LaCoO3/ZrTiO4.►It is potential for K/LaCoO3/ZrTiO4 to replace the Pt-based K/Pt/ZrTiO4 NSR catalyst.
